def _check_controllers_count(cls, task):
cluster = task.cluster
min_controllers = objects.Release.get_min_controller_count(
cluster.release)
controllers = objects.Cluster.get_nodes_by_role(
task.cluster, 'controller')
# we should make sure that cluster has at least one controller
if len(controllers) < min_controllers:
raise errors.NotEnoughControllers(
"Not enough controllers, %s mode requires at least %s "
"controller(s)" % (cluster.mode, min_controllers))
if cluster.status in (consts.CLUSTER_STATUSES.operational,
consts.CLUSTER_STATUSES.error,
consts.CLUSTER_STATUSES.update_error):
# get a list of deployed controllers - which are going
# don't to be changed
deployed_controllers = filter(
lambda node: all([
node.pending_addition is False, node.pending_deletion is
False
]), controllers)
# we should fail in case of user remove all controllers and add
# new in one task, since that's affect cluster's availability
if not deployed_controllers:
raise errors.NotEnoughControllers(
"Not enough deployed controllers - deployed cluster "
"requires at least 1 deployed controller.")
def __check_controllers_count(cls, task):
controllers_count = len(
filter(lambda node: node.role == 'controller', task.cluster.nodes))
cluster_mode = task.cluster.mode
if cluster_mode == 'multinode' and controllers_count < 1:
raise errors.NotEnoughControllers(
"Not enough controllers, %s mode requires at least 1 "
"controller" % (cluster_mode))
elif cluster_mode == 'ha' and controllers_count < 3:
raise errors.NotEnoughControllers(
"Not enough controllers, %s mode requires at least 3 "
"controllers" % (cluster_mode))
